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Suction unit / Lg Electronics Inc.




Suction unit


A suction unit includes a suction motor for generating air flow; a noise reduction unit which surrounds the suction motor and acts as a resonator in order to reduce noise generated during the operation of the suction motor; and a motor chamber which surrounds the noise reduction unit. The noise reduction unit includes an air flow path which provide a path of air flowing by the suction motor, a noise reduction chamber for eliminating the noise of at least one frequency...



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USPTO Applicaton #: #20170053634
Inventors: Geunbae Hwang, Jaehyun Kim, Goondong Park


The Patent Description & Claims data below is from USPTO Patent Application 20170053634, Suction unit.


CROSS-REFERENCE TO RELATED APPLICATIONS

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This application claims priority under 35 U.S.C. §119 and 35 U.S.C. §365 to Korean Application No. 10-2015-0115957 (filed on Aug. 18, 2015), which is hereby incorporated by reference in its entirety.

BACKGROUND

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1. Field

The present disclosure relates to a suction unit.

2. Background

Generally, the suction unit may be provided in a cleaner and be used to suck the air including the dust.

The suction unit may include a suction motor and a motor chamber housing the suction motor. Noise is generated in a process of operating the suction motor. Accordingly, a resonator may be used in order to reduce the noise.

A noise reduction device of a vacuum cleaner is disclosed in Korea Patent Publication No. 10-0710232 (registration date 04.16.2007) which is a related art of the present disclosure.

The noise reduction device of related art includes a resonator provided in the outside of the motor chamber. The resonator is provided in the outside of the outer peripheral surface of the motor chamber.

However, according to the related art, the resonator is capable of reducing the noise with a specific frequency, however there is a problem that since the resonator is provided in the outside of the motor chamber, a portion of the air flowing by the suction motor may flow the resonator and then vortex is generated in the inlet side of the resonator and thus the flow noise due to the vortex is increased.

SUMMARY

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The present disclosure is directed to a suction unit which is capable of minimizing noise generated when a suction motor is operated.

The present disclosure is directed to a suction unit which is capable of reducing discharge noise without increasing or changing the size thereof, by a reduction unit being mounted on the upstream portion and the downstream portion of the suction motor.

A suction unit includes a suction motor for generating air flow; a noise reduction unit which surrounds the suction motor and acts as a resonator in order to reduce noise generated during the operation of the suction motor; and a motor chamber which surrounds the noise reduction unit. The noise reduction unit includes an air flow path which provide a path of air flowing by the suction motor, a noise reduction chamber for eliminating the noise of at least one frequency band, and at least one communicating hole which causes sound wave of the noise to enter the noise reduction chamber. The air flow path is divided from the noise reduction chamber and thus the sound wave of the noise enters the noise reduction chamber through the communicating hole during a process in which air passes through the air flow path.

According to the present invention, since the noise reduction unit provided within the motor chamber houses the suction motor, the noise reduction unit is primarily capable of reducing the noise and the motor chamber is secondarily capable of reducing the noise. Accordingly, three is an advantage that the noise generated during the operation of the suction motor is further capable of being reduced.

In addition, since a plurality of communicating holes are formed in the circumferential direction of the guide body in the process of air flowing the guide body, a generation of the flowing noise of air due to swirl in the perimeter of the communicating hole may be prevented.

Further, since the noise reduction unit directly surrounds the suction motor, distance in which the sound wave of the noise of the specific frequency band moves to the noise reduction unit is reduced. According to this, there is an advantage that the change of the frequency of the sound wave is minimized in the process of the sound wave of the noise being moved and thus the reduction of capability of the sound reduction unit is prevented.

In addition, in a case of the present invention, there is an advantage that the noise reduction unit is disposed in the upstream or the downstream of the suction motor in the motor chamber, and thus the discharging noise may be reduced without increasing or changing the size of the noise reduction unit.

BRIEF DESCRIPTION OF THE DRAWINGS

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FIG. 1 is an exploded perspective view illustrating a suction unit according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a suction unit according to an embodiment of the present invention.

FIG. 3 is an exploded perspective view illustrating a noise reduction unit according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a noise reduction unit according to an embodiment of the present invention.

FIG. 5 is a graph illustrating frequency-dependent noise according to the presence or absence of the noise reduction unit.

FIG. 6 is a cross-sectional view illustrating a noise reduction unit according to the other embodiment of the present invention.

DETAILED DESCRIPTION

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OF THE EMBODIMENTS

FIG. 1 is an exploded perspective view illustrating a suction unit according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a suction unit according to an embodiment of the present invention.

FIG. 3 is an exploded perspective view illustrating a noise reduction unit according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a noise reduction unit according to an embodiment of the present invention.

With reference to FIG. 1 to FIG. 4, the suction unit 1 according to the an embodiment of the present invention may be mounted on the inside of the vacuum cleaner and then may be used, as an example.

The suction unit 1 may include a suction motor 10 for generating the suction force, a noise reduction unit 20 for housing the suction motor 10 and reducing the noise generated during the operation of the suction motor 10, and a motor chamber 30 housing the noise reduction unit 20.




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stats Patent Info
Application #
US 20170053634 A1
Publish Date
02/23/2017
Document #
15240676
File Date
08/18/2016
USPTO Class
Other USPTO Classes
International Class
/
Drawings
7


Frequency Band Rounds

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20170223|20170053634|suction unit|A suction unit includes a suction motor for generating air flow; a noise reduction unit which surrounds the suction motor and acts as a resonator in order to reduce noise generated during the operation of the suction motor; and a motor chamber which surrounds the noise reduction unit. The noise |Lg-Electronics-Inc
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